Drawn map page: Enable antialiasing, turn eraser cursor red

Fix cursor circle being too large in drawn map editor

Backed out changeset 3a110dcb6e87 (Qt color chooser)

While the intent was good, saving column width/sort was unfortunately not handling the addition of new columns and old configs were losing columns. If this is restored, it should have some check on column with invalidation of config.

Add voicepack: Russian_pl (by mtg90pl)

- Fix missions path, still needs refactoring...

Fix frontend from messing with legacy schemes.ini, just read it, never write

Rename the misleadingly-named AmmoSchemeModel to GameSchemeModel AmmoSchemeModel was a misleading name, this class was actually used only for game schemes.

Game scheme handling: Use QFile instead of QSettings for increased efficiency

Fix bad import of old ammo schemes, improve debug output when importing schemes from old .ini files

Remove old Qt4 workaround for missing language name of Scottish Gaelic

Force color dialog to use Qt style. Fixes some issues

- Fix missions regression: presentation of list is good, still problem with path during launching

- Fix missions regression: refactoring, WIP

Update German Lua translation

Movement Training: Revert ice girder color for consistency with TechRacer and HedgeEditor

Merge qt5transition into default

Movement training: Tweak some sprite visuals

Workaround for the weird new qgraphicsview/qgraphicsscene fitInView behavior

Movement Training: Make the use of the mission panel clearer and harder to overlook

Basic Bazooka Training: Add one more target, make limited ammo section easier, add more hints

Rope Training: Place the second-last target at a more reasonable position

Frontend: Fix built-in Qt translations not loaded properly

Update INSTALL.md about new Qt5 dependency